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Finding the Fourth Proportional to 557.68, 769.66 and 324.80

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Solution

The fourth proportional to 557.68, 769.66 and 324.80 is: 448.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.68 : 769.66 = 324.80 : x
  2. Step 2: Convert to fraction form
    557.68/769.66 = 324.80/x
  3. Step 3: Cross multiply
    557.68x = 769.66 × 324.80
  4. Step 4: Simplify right side
    557.68x = 249,985.57
  5. Step 5: Solve for x
    x = 249,985.57/557.68
  6. Step 6: Final answer
    x = 448.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.